Omnidirectional Reflection from a One-Dimensional Photonic Crystal,
... the propagation of light to be controlled in otherwise diff icult or impossible ways.1 – 4 In particular, a photonic crystal can be a perfect mirror for light from any direction, with any polarization, within a specified frequency range. It is natural to assume that a necessary condition for such om ...
... the propagation of light to be controlled in otherwise diff icult or impossible ways.1 – 4 In particular, a photonic crystal can be a perfect mirror for light from any direction, with any polarization, within a specified frequency range. It is natural to assume that a necessary condition for such om ...
Electric Propulsion
... mass. The propellant mass fraction, expressed as 1 - mf/mi, would ideally be 1, although completely impractical since the entire vehicle would be propellant. The ideal propellant mass fraction of 1 would also mean that the final-to-initial mass ratio be zero, or the final mass is zero. Also, this is ...
... mass. The propellant mass fraction, expressed as 1 - mf/mi, would ideally be 1, although completely impractical since the entire vehicle would be propellant. The ideal propellant mass fraction of 1 would also mean that the final-to-initial mass ratio be zero, or the final mass is zero. Also, this is ...
Koji Arai – LIGO Laboratory / Caltech
... rnode, and also higher-order Hermite-gaussian or Laguerre-gaussian modeg., as resonant modes of the (avity. We will see in this section that this simple description is ...
... rnode, and also higher-order Hermite-gaussian or Laguerre-gaussian modeg., as resonant modes of the (avity. We will see in this section that this simple description is ...
Building a Helium — Neon Gas Laser Lab Manual Figure 1
... a metal outer ring, an array of small woven metal pieces on the inside, and an adjustment lever; when the lever is used to open or close the iris, it acts as the iris in your eye, expanding and contracting to let more or less Figure 12: The Mirrors light through. There are two basic types of mirrors ...
... a metal outer ring, an array of small woven metal pieces on the inside, and an adjustment lever; when the lever is used to open or close the iris, it acts as the iris in your eye, expanding and contracting to let more or less Figure 12: The Mirrors light through. There are two basic types of mirrors ...
Passive intrinsic-linewidth narrowing of ultraviolet extended-cavity diode laser by weak optical feedback.
... the other hand have typical linewidths of a few hundred kHz to a few MHz, with shorterwavelength systems generally on the broader end [2]. Numerous schemes exist for narrowing their linewidth. Optical feedback from a resonator [3] can be used to reduce the linewidth of an ECDL, and recent systems [4 ...
... the other hand have typical linewidths of a few hundred kHz to a few MHz, with shorterwavelength systems generally on the broader end [2]. Numerous schemes exist for narrowing their linewidth. Optical feedback from a resonator [3] can be used to reduce the linewidth of an ECDL, and recent systems [4 ...
Photon number resolution using a time-multiplexed single
... corresponding to all of the ways in which n photons can be distributed over the 23 modes. As a result, mathematica was used to sum the contribution of each term in the state vector to the probability distribution P (m|n). In doing so, it was assumed that P0 = (1 − η)q , where P0 is the probability t ...
... corresponding to all of the ways in which n photons can be distributed over the 23 modes. As a result, mathematica was used to sum the contribution of each term in the state vector to the probability distribution P (m|n). In doing so, it was assumed that P0 = (1 − η)q , where P0 is the probability t ...
Optical Activity
... time of origin of life, organic molecules corresponding to both right and left-handed forms were produced. Laboratory synthesis always produces both types. However, in the first living systems on earth, left or right-handed activity could have been adopted purely as a matter of chance and, once a pa ...
... time of origin of life, organic molecules corresponding to both right and left-handed forms were produced. Laboratory synthesis always produces both types. However, in the first living systems on earth, left or right-handed activity could have been adopted purely as a matter of chance and, once a pa ...
P5.3.2.3 - LD Didactic
... directions. Intensity maxima always occur at positions where the path difference ∆s between the partial bundles from A’ is an integer multiple of the wavelength λ. At great distances L1, the following relation for the distance d between two neighbouring maxima (or minima) holds: ...
... directions. Intensity maxima always occur at positions where the path difference ∆s between the partial bundles from A’ is an integer multiple of the wavelength λ. At great distances L1, the following relation for the distance d between two neighbouring maxima (or minima) holds: ...
Photonic laser thruster
A photonic laser thruster is an amplified laser thruster that generates thrust directly from the laser photon momentum, rather than laser-heating propellant. The concept of single-bounce laser-pushed lightsails that utilize the photon momentum was first developed in the 1960s, however, its conversion of laser power to thrust is highly inefficient, thus has been considered impractical. Over 50 years, there had been numerous theoretical and experimental efforts to increase the conversion efficiency by recycling photons, bouncing them repetitively between two reflective mirrors in an empty optical cavity, without success. In December 2006, Young Bae successfully solved this problem and demonstrated the conversion efficiency enhancement by a factor of 100 and a photon thrust of 35 micronewtons by putting the laser energizing media between the two mirrors as in typical lasers, and the photonic laser thruster was born. In August 2015, the photonic laser thruster was demonstrated to increase the conversion efficiency enhancement by a factor over 1,000 and to achieve a photon thrust of 3.5 millinewtons at Y.K. Bae Corporation. In addition, Propelling, slowing and stopping of a small satellite, 1U CubeSat, in simulated zero-gravity were demonstrated. The photonic laser thruster was initially developed for use in nanometer precision spacecraft formation, for forming ultralarge space telescopes and radars. The photonic laser thruster is currently developed for high-precision and high-speed maneuver of small spacecraft, such as formation flying, orbit adjustments, drag compensation, and rendezvous and docking. The photonic laser thruster can be used for beaming thrust from a conventional heavy resource vehicle to a more expensive & lightweight mission vehicle, similar to tankers in aerial refueling.The practical usage of the photonic laser thruster for main space propulsion would require extremely high laser powers and overcoming technological challenges in achieving the laser power and fabricating the required optics. Photonic laser thrusters have a very high specific impulse, and can permit spacecraft reach much higher speeds than with conventional rockets, which are limited by the Tsiolkovsky rocket equation. If the photonic laser thruster is scalable for the use in such main space propulsion, multiple photonic laser thrusters can be used to construct a 'photonic railway' that has been proposed as a potential permanent transport infrastructure for interplanetary or interstellar commutes, allowing the transport craft themselves to carry very little fuel.